• What's the difference between a kilobit and a kilobyte?
• OC-3? T3? T1? How fast are these?
• What is the maximum speed for ADSL?
• What is the maximum speed for SDSL?
• How fast does a file download at each speed/line?
• Where is the best collection of speed tests?
• What is my top speed?

The Dial-up FAQ has a great explanation for this -- http://www.dslreports.com/faq/3758

http://www.t1shopper.com/tools/calculate/ has some good details as well.

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by removed
last modified: 2004-02-20 17:37:25

From http://yocum.org/faqs/bandwidth/:

OC-255						13.21 Gbps
OC-192						10 Gbps 
OC-96						4.976 Gbps 
OC-48, STS-48					2.488 Gbps 
OC-36						1.866 Gbps
OC-24						1.244 Gbps 
OC-18						933.12 Mbps 
OC-12, STS-12					622.08 Mbps 
OC-9						466.56 Mbps 
OC-3, STS-3					155.52 Mbps
CDDI, FDDI, Fast Ethernet, Category 5 cable	100 Mbps
OC-1, STS-1					51.84 Mbps
T-3, DS-3 North America				44.736 Mbps
E-3 Europe					34.368 Mbps 
Category 4 cable				20 Mbps
Token Ring LANs					16 Mbps
Thin Ethernet, category 3 cable, cable modem	10Mbps
E-2 Europe					8.448 Mbps
T-2, DS-2 North America				6.312 Mbps
Standard ADSL downstream			6.144 Mbps
DS-1c						3.152 Mbps
E-1, DS-1 Europe				2.048 Mbps
ADSL, T-1, DS-1 North America			1.544 Mbps
ISDN						128 Kbps
DS-0, pulse code modulation			64 Kbps	
U.S. Robotics x2 modems,			56 Kbps	56flex
56flex, x2 modem communications rate		33.6 Kbps
V.34, Rockwell V.Fast Class modems		28.8 Kbps 
Level 1 cable, minimum cable data speed		20 Kbps
V.32bis modem, V.17 fax				14.4 Kbps
modem speed circa early 1990s			9600 bps
modem speed circa 1980s				2400 bps

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by removed
last modified: 2004-01-26 23:37:41

From http://www.dslreports.com/faq/356:
The top speed for ADSL lines is around 8 mbit/sec for the download, and 1 mbit/sec for the upload.

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by removed

From http://www.dslreports.com/faq/356:
For SDSL lines the top speed is 2.3 mbit/sec on both the upload and download.

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by removed

Martindale's File Download Time Calculator gives this for lots of bandwidths simultaneously.

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by climbers edited by removed
last modified: 2004-01-29 17:17:24

TestMySpeed.com has tests from all over the United States, as well as the rest of the world, collected in one handy place.

The DSL Reports speedtest page has a good collection as well.

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by climbers edited by removed
last modified: 2004-01-29 17:56:55

When you are networked to the Internet, or to your own network, the bandwidth given is the theoretical maximum. The real world, of course, doesn't work like that. There are many things which affect your actual bandwidth. This is a simple introduction to the basics: Bandwidth

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by climbers edited by removed
last modified: 2005-06-19 21:35:09